[INFO] cloning repository https://github.com/muggenhor/rudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/muggenhor/rudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuggenhor%2Frudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuggenhor%2Frudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e56514818b3e07b6644c305613068004d23f7ccf
[INFO] testing muggenhor/rudoku against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuggenhor%2Frudoku" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/muggenhor/rudoku on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/muggenhor/rudoku
[INFO] finished tweaking git repo https://github.com/muggenhor/rudoku
[INFO] tweaked toml for git repo https://github.com/muggenhor/rudoku written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/muggenhor/rudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b6e6f594db6f10457a164d70fa0584daae43352ef6024ad333700c0b9f2cbd1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8b6e6f594db6f10457a164d70fa0584daae43352ef6024ad333700c0b9f2cbd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b6e6f594db6f10457a164d70fa0584daae43352ef6024ad333700c0b9f2cbd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b6e6f594db6f10457a164d70fa0584daae43352ef6024ad333700c0b9f2cbd1", kill_on_drop: false }`
[INFO] [stdout] 8b6e6f594db6f10457a164d70fa0584daae43352ef6024ad333700c0b9f2cbd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7badb2df3f0fe4e0982a69354a285e558e71da4acfe8afd728dcf221b2426fc2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7badb2df3f0fe4e0982a69354a285e558e71da4acfe8afd728dcf221b2426fc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.1.8
[INFO] [stderr]    Compiling regex v0.1.30
[INFO] [stderr]    Compiling log v0.3.1
[INFO] [stderr]    Compiling env_logger v0.3.1
[INFO] [stderr]    Compiling rudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:47:18
[INFO] [stdout]    |
[INFO] [stdout] 47 |         for i in (0 .. 9) {
[INFO] [stdout]    |                  ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 47 -         for i in (0 .. 9) {
[INFO] [stdout] 47 +         for i in 0 .. 9 {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:67:20
[INFO] [stdout]    |
[INFO] [stdout] 67 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 67 -         for row in (0 .. self.cells.len()) {
[INFO] [stdout] 67 +         for row in 0 .. self.cells.len() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 68 |             for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]    |                        ^                          ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 68 -             for col in (0 .. self.cells[row].len()) {
[INFO] [stdout] 68 +             for col in 0 .. self.cells[row].len() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:85:20
[INFO] [stdout]    |
[INFO] [stdout] 85 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 85 -         for row in (0 .. self.cells.len()) {
[INFO] [stdout] 85 +         for row in 0 .. self.cells.len() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:101:32
[INFO] [stdout]     |
[INFO] [stdout] 101 |                     for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]     |                                ^                          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 101 -                     for col in (0 .. self.cells[row].len()) {
[INFO] [stdout] 101 +                     for col in 0 .. self.cells[row].len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:111:20
[INFO] [stdout]     |
[INFO] [stdout] 111 |         for col in (0 .. self.cells[0].len()) {
[INFO] [stdout]     |                    ^                        ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 111 -         for col in (0 .. self.cells[0].len()) {
[INFO] [stdout] 111 +         for col in 0 .. self.cells[0].len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 113 -             for row in (0 .. self.cells.len()) {
[INFO] [stdout] 113 +             for row in 0 .. self.cells.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:118:24
[INFO] [stdout]     |
[INFO] [stdout] 118 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 118 -             for row in (0 .. self.cells.len()) {
[INFO] [stdout] 118 +             for row in 0 .. self.cells.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:127:32
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                                ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -                     for row in (0 .. self.cells.len()) {
[INFO] [stdout] 127 +                     for row in 0 .. self.cells.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:137:26
[INFO] [stdout]     |
[INFO] [stdout] 137 |         for row_block in (0 .. 3) {
[INFO] [stdout]     |                          ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 137 -         for row_block in (0 .. 3) {
[INFO] [stdout] 137 +         for row_block in 0 .. 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:138:30
[INFO] [stdout]     |
[INFO] [stdout] 138 |             for col_block in (0 .. 3) {
[INFO] [stdout]     |                              ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -             for col_block in (0 .. 3) {
[INFO] [stdout] 138 +             for col_block in 0 .. 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:141:26
[INFO] [stdout]     |
[INFO] [stdout] 141 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 141 -                 for i in (0 .. 9) {
[INFO] [stdout] 141 +                 for i in 0 .. 9 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:150:26
[INFO] [stdout]     |
[INFO] [stdout] 150 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 150 -                 for i in (0 .. 9) {
[INFO] [stdout] 150 +                 for i in 0 .. 9 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:163:34
[INFO] [stdout]     |
[INFO] [stdout] 163 |                         for i in (0 .. 9) {
[INFO] [stdout]     |                                  ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -                         for i in (0 .. 9) {
[INFO] [stdout] 163 +                         for i in 0 .. 9 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/rudoku/mod.rs:271:16
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/rudoku/mod.rs:271:64
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                                                                ^                         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 271 -             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout] 271 +             '1'...'9' => cur_puzzle.set_item(col_num, row_num, c as usize - '0' as usize),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.80s
[INFO] running `Command { std: "docker" "inspect" "7badb2df3f0fe4e0982a69354a285e558e71da4acfe8afd728dcf221b2426fc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7badb2df3f0fe4e0982a69354a285e558e71da4acfe8afd728dcf221b2426fc2", kill_on_drop: false }`
[INFO] [stdout] 7badb2df3f0fe4e0982a69354a285e558e71da4acfe8afd728dcf221b2426fc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dc4381eada2f34972bcd1f055713b8837af6c16e303def4b3d694568cf7120d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1dc4381eada2f34972bcd1f055713b8837af6c16e303def4b3d694568cf7120d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:47:18
[INFO] [stdout]    |
[INFO] [stdout] 47 |         for i in (0 .. 9) {
[INFO] [stdout]    |                  ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 47 -         for i in (0 .. 9) {
[INFO] [stdout] 47 +         for i in 0 .. 9 {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:67:20
[INFO] [stdout]    |
[INFO] [stdout] 67 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 67 -         for row in (0 .. self.cells.len()) {
[INFO] [stdout] 67 +         for row in 0 .. self.cells.len() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 68 |             for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]    |                        ^                          ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 68 -             for col in (0 .. self.cells[row].len()) {
[INFO] [stdout] 68 +             for col in 0 .. self.cells[row].len() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:85:20
[INFO] [stdout]    |
[INFO] [stdout] 85 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 85 -         for row in (0 .. self.cells.len()) {
[INFO] [stdout] 85 +         for row in 0 .. self.cells.len() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:101:32
[INFO] [stdout]     |
[INFO] [stdout] 101 |                     for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]     |                                ^                          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 101 -                     for col in (0 .. self.cells[row].len()) {
[INFO] [stdout] 101 +                     for col in 0 .. self.cells[row].len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:111:20
[INFO] [stdout]     |
[INFO] [stdout] 111 |         for col in (0 .. self.cells[0].len()) {
[INFO] [stdout]     |                    ^                        ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 111 -         for col in (0 .. self.cells[0].len()) {
[INFO] [stdout] 111 +         for col in 0 .. self.cells[0].len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 113 -             for row in (0 .. self.cells.len()) {
[INFO] [stdout] 113 +             for row in 0 .. self.cells.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:118:24
[INFO] [stdout]     |
[INFO] [stdout] 118 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 118 -             for row in (0 .. self.cells.len()) {
[INFO] [stdout] 118 +             for row in 0 .. self.cells.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:127:32
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                                ^                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -                     for row in (0 .. self.cells.len()) {
[INFO] [stdout] 127 +                     for row in 0 .. self.cells.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:137:26
[INFO] [stdout]     |
[INFO] [stdout] 137 |         for row_block in (0 .. 3) {
[INFO] [stdout]     |                          ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 137 -         for row_block in (0 .. 3) {
[INFO] [stdout] 137 +         for row_block in 0 .. 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:138:30
[INFO] [stdout]     |
[INFO] [stdout] 138 |             for col_block in (0 .. 3) {
[INFO] [stdout]     |                              ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -             for col_block in (0 .. 3) {
[INFO] [stdout] 138 +             for col_block in 0 .. 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:141:26
[INFO] [stdout]     |
[INFO] [stdout] 141 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 141 -                 for i in (0 .. 9) {
[INFO] [stdout] 141 +                 for i in 0 .. 9 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:150:26
[INFO] [stdout]     |
[INFO] [stdout] 150 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 150 -                 for i in (0 .. 9) {
[INFO] [stdout] 150 +                 for i in 0 .. 9 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:163:34
[INFO] [stdout]     |
[INFO] [stdout] 163 |                         for i in (0 .. 9) {
[INFO] [stdout]     |                                  ^      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -                         for i in (0 .. 9) {
[INFO] [stdout] 163 +                         for i in 0 .. 9 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/rudoku/mod.rs:271:16
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/rudoku/mod.rs:271:64
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                                                                ^                         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 271 -             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout] 271 +             '1'...'9' => cur_puzzle.set_item(col_num, row_num, c as usize - '0' as usize),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `Command { std: "docker" "inspect" "1dc4381eada2f34972bcd1f055713b8837af6c16e303def4b3d694568cf7120d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dc4381eada2f34972bcd1f055713b8837af6c16e303def4b3d694568cf7120d", kill_on_drop: false }`
[INFO] [stdout] 1dc4381eada2f34972bcd1f055713b8837af6c16e303def4b3d694568cf7120d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e5ec6d005fbb46879715abd7b5c768ede3546faa7fd7f95806086a000de76e19
[INFO] running `Command { std: "docker" "start" "-a" "e5ec6d005fbb46879715abd7b5c768ede3546faa7fd7f95806086a000de76e19", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]   --> src/rudoku/mod.rs:47:18
[INFO] [stderr]    |
[INFO] [stderr] 47 |         for i in (0 .. 9) {
[INFO] [stderr]    |                  ^      ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 47 -         for i in (0 .. 9) {
[INFO] [stderr] 47 +         for i in 0 .. 9 {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]   --> src/rudoku/mod.rs:67:20
[INFO] [stderr]    |
[INFO] [stderr] 67 |         for row in (0 .. self.cells.len()) {
[INFO] [stderr]    |                    ^                     ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 67 -         for row in (0 .. self.cells.len()) {
[INFO] [stderr] 67 +         for row in 0 .. self.cells.len() {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]   --> src/rudoku/mod.rs:68:24
[INFO] [stderr]    |
[INFO] [stderr] 68 |             for col in (0 .. self.cells[row].len()) {
[INFO] [stderr]    |                        ^                          ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 68 -             for col in (0 .. self.cells[row].len()) {
[INFO] [stderr] 68 +             for col in 0 .. self.cells[row].len() {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]   --> src/rudoku/mod.rs:85:20
[INFO] [stderr]    |
[INFO] [stderr] 85 |         for row in (0 .. self.cells.len()) {
[INFO] [stderr]    |                    ^                     ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 85 -         for row in (0 .. self.cells.len()) {
[INFO] [stderr] 85 +         for row in 0 .. self.cells.len() {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:101:32
[INFO] [stderr]     |
[INFO] [stderr] 101 |                     for col in (0 .. self.cells[row].len()) {
[INFO] [stderr]     |                                ^                          ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 101 -                     for col in (0 .. self.cells[row].len()) {
[INFO] [stderr] 101 +                     for col in 0 .. self.cells[row].len() {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:111:20
[INFO] [stderr]     |
[INFO] [stderr] 111 |         for col in (0 .. self.cells[0].len()) {
[INFO] [stderr]     |                    ^                        ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 111 -         for col in (0 .. self.cells[0].len()) {
[INFO] [stderr] 111 +         for col in 0 .. self.cells[0].len() {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:113:24
[INFO] [stderr]     |
[INFO] [stderr] 113 |             for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                        ^                     ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 113 -             for row in (0 .. self.cells.len()) {
[INFO] [stderr] 113 +             for row in 0 .. self.cells.len() {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:118:24
[INFO] [stderr]     |
[INFO] [stderr] 118 |             for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                        ^                     ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 118 -             for row in (0 .. self.cells.len()) {
[INFO] [stderr] 118 +             for row in 0 .. self.cells.len() {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:127:32
[INFO] [stderr]     |
[INFO] [stderr] 127 |                     for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                                ^                     ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 127 -                     for row in (0 .. self.cells.len()) {
[INFO] [stderr] 127 +                     for row in 0 .. self.cells.len() {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:137:26
[INFO] [stderr]     |
[INFO] [stderr] 137 |         for row_block in (0 .. 3) {
[INFO] [stderr]     |                          ^      ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 137 -         for row_block in (0 .. 3) {
[INFO] [stderr] 137 +         for row_block in 0 .. 3 {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:138:30
[INFO] [stderr]     |
[INFO] [stderr] 138 |             for col_block in (0 .. 3) {
[INFO] [stderr]     |                              ^      ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 138 -             for col_block in (0 .. 3) {
[INFO] [stderr] 138 +             for col_block in 0 .. 3 {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:141:26
[INFO] [stderr]     |
[INFO] [stderr] 141 |                 for i in (0 .. 9) {
[INFO] [stderr]     |                          ^      ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 141 -                 for i in (0 .. 9) {
[INFO] [stderr] 141 +                 for i in 0 .. 9 {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:150:26
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 for i in (0 .. 9) {
[INFO] [stderr]     |                          ^      ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 150 -                 for i in (0 .. 9) {
[INFO] [stderr] 150 +                 for i in 0 .. 9 {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/rudoku/mod.rs:163:34
[INFO] [stderr]     |
[INFO] [stderr] 163 |                         for i in (0 .. 9) {
[INFO] [stderr]     |                                  ^      ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 163 -                         for i in (0 .. 9) {
[INFO] [stderr] 163 +                         for i in 0 .. 9 {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/rudoku/mod.rs:271:16
[INFO] [stderr]     |
[INFO] [stderr] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]    --> src/rudoku/mod.rs:271:64
[INFO] [stderr]     |
[INFO] [stderr] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stderr]     |                                                                ^                         ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 271 -             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stderr] 271 +             '1'...'9' => cur_puzzle.set_item(col_num, row_num, c as usize - '0' as usize),
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: `rudoku` (bin "rudoku" test) generated 16 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rudoku-aea5c95c692a9d4b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::test_can_solve_puzzle ... ok
[INFO] [stdout] test test::test_can_solve_empty_puzzle ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e5ec6d005fbb46879715abd7b5c768ede3546faa7fd7f95806086a000de76e19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5ec6d005fbb46879715abd7b5c768ede3546faa7fd7f95806086a000de76e19", kill_on_drop: false }`
[INFO] [stdout] e5ec6d005fbb46879715abd7b5c768ede3546faa7fd7f95806086a000de76e19